Copper-containing disazo dyestuffs



United States Patent Ice Patented 33533:

wherein n is a positive integer ranging from 1 to 3, and

187 with a compound of the formula 3,399, COPPER-CONTAINING DISAZO DYESTUFFS Rudolf Diirig, Base], and Werner Bossard, Riehen, near 0H Basel, Switzerland, assignors to J. R. Geigy A.G., Basel, Switzerland 5 No Drawing. Filed Aug. 23, 1965, Ser. No. 481,885 Y Claims priority application Switzerland Sept. 30 1 964,

6 Claims. (Cl. 260148) wherein Y represents hydrogen, lower alkyl, lower alkoxy, acylammo especially lower alkanoylammo or ABSTRACT OF THE DISCLOSURE benzoylamino, nitro, sulfo or halogen, especially chlo- Copper-containing disazo dyestuffs of the formula rine or bromine,

Wherem to form the corresponding disazo compound, the com- Y represents hydrogen, lower alkyl, lower alkoxy, lower ponents being so chosen that the end product contains alkanoylamino, benzoylamino, nitro, sulfo, chlorine or from 3 to 4 sulfonic acid groups, and converting this bromine, and disazo compound with agents giving off copper to a n represents a positive whole number from 1 to 3, and copper complex diazo dyestuif of the formula Y A Hols NHOONH- which dyestuff contains from 3 to 4 sulfonic acid Lower in connection with an aliphatic radical means groups. that the latter contains from 1 to 4 carbon atoms.

, The tetrazotized 4,4-diaminodiphenyl compound of gif 2 3 52 are useful for the dyemg of fibers con Formula I is coupled with the compounds of Formula II and III to form the disazo compounds in a known manner in an alkaline medium, optionally in the presence The present invention concerns new copper-containing of organic nitrogen bases which facilitate the coupling disazo dyestuffs, a process for the production thereof, such as pyridine and homologs thereof, trialkylamines their use for the dyeing of fibers containing cellulose as or tertiary alkanolamines. well as, as industrial products, textile material dyed In the form of their alkali metal salts, the metal-free therewith. 55 disazo compounds are dark powders which dissolve in It has been found that valuable copper-containing water with a blue color. They are preferably coppered disazo dyestuffs are obtained by coupling a known tetrazin substance and the cellulose fibers are dyed with the otized 4,4-diaminodiphenyl compound of the formula dyestuffs containing copper. Agents giving olf copper X0 OX used to form such dyestuffs are mainly water soluble copper(II) salts, particularly copper(II)-sulfate or copper(II)-tetramine sulfate. The metallizable disazo (1) compounds are coppered by known methods, advantageously in a weakly acid to alkaline medium, optionally in the presence of water-soluble organic bases such as dialkylamines or pyridine. However, the metal-free disazo compounds can also be dyed onto cellulose fibers from an aqueous liquor containing organic salt having a neu- OH tral reaction such as sodium sulfate and then treated,

on the fiber, with agents giving off copper. (H03S) 70 The new dyestuffs of Formula IV have very great substantivity but in spite of this fact they possess very good (11) water solubility. Thus very deep navy blue dyeings havwherein X represents a lower alkyl radical, especially methyl or ethyl, in any order desired, with a known hydroxynaphthalene sulfonic acid, coupling in a position adjacent to the hydroxyl group, and being of the formula ing a light reddish or greenish tinge can be'attained therewithon cellu los e fibers such as. cotton, .preferably by exhaustion dyeing. The dyeings have remarkable fastness properties, particularly when after-treated with cationic agents which imprve the wet fastness properties. g

Compared with known dyestufifs in which the terminal benzene radical B is linked to the adjacent naphthalene moiety via a semi-urea bridge, the dyestulfs of the invention are distinguished by improved drawing power from exhaustion dyebaths; moreover, the resulting dyeings on cotton obtained with the said known dyestuflfs are of inferior wash fastness (test: bleeding on wool in weakly alkaline medium at 60 C.) even when aftertreated with a cationic dyestufi fixing agent.

and fastness to light of the dyeings are not affected to any noticeable extent. This is particularly the case with 9 187 t r 1f those dyestuffs of Formula IV wherein the naphthyl r'adical A 'is a 1- hydroxy disulfonaphthyl (2) 'radica'i,

particularly the 1 hydroxy 3,6 disulfonaphthyl (If radical.

Dyeings on cotton with optimal fastness properties and exhaustion rate are obtained with those dyestuffs according'to the invention which fall under theformula wherein Y represents hydrogen, lower alkyl, chlorine or bromine.

a The following non-limitative examples serve to illustrate the invention. Temperatures are given therein in degrees centigrade.

Example 1 24.4 g. of 4,4'-diamino-3,3-dimethoxydiphenyl are tet razotised in the usual way and the tetrazo compound is poured into a 0-5 cold solution of 30.4 g. of l-hydroxynaphthalene-3,8-disulphonic acid and 35 g. of sodium carbonate in 1000 ml. of water. After a short time the I II III IV N 0. component A component B shade on.

cotton 2 l-hydroxynaphthalene-3,6-disulphonic 2-(4-sulphophenylureido)-Erhydroxynaph- Blue.

acid. thalene-7-sulphonie acid. 3 2-hydroxynaphthalene-3,fi-disulpbonic do Reddlsh acid. blue. 4 Z-hydgoxynaphthalene-fifi-disulphonic -....do Do.

801 5 1-hydroxynaphthalene-3,6-disulphonie 2-phenylureido-5-hydroxynaphthalene-7- Blue.-

aeid. sulphonic acid. 6 l-hygoxynaphthalene-3,8-disulphonic .do Do.

aer 7 1-hy%roxynaphthalene3,6,8-trisulphonic .....do Do.

act 8 2-hyddroxynaphthalene-3,6-disulphonic ...-.d0 Reddish acl Blue. 9 2-hy droxynaphtha1ene-6,8-disulphonic 2-(3-hromophenylureido)-5-hydroxynaph- Blue.

acld. thalene-7-su1phonie acid. 10 1-hy droxynaphthalene-3,6-disulphonie 2-(3-ohlorophenylureido)-5-hydroxynaph- Do.

ac thalene-7-sulphonie acid. 11 2-hy%roxynaphthalene-6,8-disu1phonic d0 Reddish 801 Blue. 12 2-hydroxynaphthalene-Bfidisulphonic 2-(4-nitrophenylureido)-5-hydroxynaph- 7 Do.

acid. thalene-7-sulphonic acid. a H rln 2-(4-acetylaminophenylureido)-5-hy- D0.

droxynaphthalene-7-sulphonic acid. 14 1-hydiroxynaphthaleneh,6,8-tr1sulphonic ..do Blue.

367. 15 1-hydroxynaphthalene-3,6,8-trisulphonic 2-(3-nitrophenylureido)-5-hydroxynaph- D0.

acid. thalene-7-sulphonic acid. 16 l-hydroxynaphthalene-3,6-d1su1phon1e 2-(3-sulphophenylureido)-5-hydroxynaph- Do.

acid. thalene-7-su1phonic acid. l-hydoxynaphthalene-ii,S-disulphonic .'do Do.

act 18 l-hydroxynaphthalene-4-sulphonic acid 2-(3-sulphophenylureido)-5-hydroxy11apl1- Reddish thalene-7-sulphonie acid. blue. 19 2-hydroxynaphthalene-tl'sulphonic acid ..do D0. 20 l-hydroxynaphtllalenc'iifi-disulphonlc 2-(3-methyl-phenylure -5-hydr0xy- Do.

acld. naphthalene-7-sulphonic acid. 21 ..do 2-(4-meth0xy-phenylureido)-5hydroxy- Do.

' naphthalene-7-sulplionic acid. 22 ..d0 2-(4'-propionylamino-phenylureido)-5-hy- Do.

droxynaphthaleneJ-sulphonie acid. 23 d0 2-(4-benzoylamir1o-phcnylureido)-&hy- Do.

droxynaphthalene-7-sulphonic acid.

6 diazo-monoazo dyestulf has completely precipitated and colour an which draws excellently from an aqueous hath no more tetrazonium compound can be traced. A sodium onto cotton, linen and regenerated cellulose fibres. The carbonate alkaline solution of 43.8 g. of 2-(4-sulphodyeings, particularly in navy blue shades, have excellent phenylureido.)r5-hydroxynaphthalene-7-sulphonic acid is light fastness and the shade and fastness to light are then added to this reaction mixture and the whole is 5 hardly influenced at all by anti-crease processing. stirred until the coupling is complete. The disazo dyestufi obtained in this way is precipitated with sodium chloride, Examp 1e filtered off and again dissolved in 2500 ml. of 80-85 Example 24 is repeated, but in lieu of l-hydroxyhot water. 400 ml. of a copper oxide-ammonia solution naphthalene-3,6-disulfonic acid, there is used 30.4 g. of

which contains 50 g. of crystalline copper sulphate and 10 2-hydroxynaphthalene-'6,8-disulfonic acid, all other re- 120 ml. of concentrated aqueous ammonia, are then actants and reaction conditions remaining the same. added to this solution and the whole is stirred for 4 to 5 There is obtained the dystulf of the formula hours at '80-85. After adding another 50 ml. of concenwhich affords dyeings, especially on cotton, which are of trated ammonia solution, the whole is heated for 10-20 navy blue shades with a slightly more reddish tinge than hours at 90-95. The copper complex formed is precipithose obtained in the preceding example, of similar good tated with sodium chloride, filtered oil and dried. It is fastness properties.

a dark powder which dissolves in water with a blue colour The wash fastness of these dyestuffs is ensured by an and which draws excellently onto cotton, linen and regenafter-treatment with a cationic dyestufi? fixing agent. erated cellulose fibres from an aqueous bath. The dyeings, Example 26 particularly in navy blue shades, are excellently light fast and the shade and fastness to light are hardly influenced In a dyebath, 6 gof the dyestulf obtained according at all by anti-crease processing. I to Example 24 are dissolved in 3000 ml. of water con- If, instead of the hydroxynaphthalene sulphonic acids taining 1 g. of sodium carbonate. 100 g. of cotton are given in the example, the components A and B given in introduced into the liquor at 50, the bath is heated columns 11 and III are used and otherwise the procedure Within 30 mini-H f0 tWO P F h 0f 40 ggiven in the example is followed, then valuable dyestufls 40 of sodium sulfate are then added successively and the are also obtained which have the shades given in goods are dyed for 60 minutes at the last-mentioned column IV. temperature. The dyed goods are rinsed cold and then Example 24 0(!}u (I) 0Tu (i) NHCONH HOaS SO3H HOaS 24.4 g. of 4,4'-diamino-3,3'-dimethoxydiphenyl are introduced into 3000 ml. of an aqueous bath containtetrazotised in the usual way and the tetrazo solution is ing 1 g. of the quaternized product of pentamethyldipoured into a 0-5" cold solution of 30.4 g. of l-hydroxyethylene-triamine and 2,2'-diclorodiethylether, produced naphthalene-3,6-disulphonic acid and 35 g. of sodium as described in Example 1 of British Patent 702,695,

carbonate in 1000 ml. of water. After a short time, the added to the bath in the form of a 35 %-aqueous soludiazo-monoazo dyestufi has completely precipitated and tion, as cationic fixing agent, acidified with 0.5 ml. of no more tetrazonium compound can be traced. A sodium 40%-acetic acid; the goods are left for 20 minutes in carbonate alkaline solution of 35.8 g. of 2-phenylureidothe bath which has a temperature of 30, and then re- 5-hydroxynaphthalene-7-sulphonic acid in 200 ml. of wamoved and dried without intermediate rinsing.

ter is now added to the reaction mixture and the whole A strong navy blue dyeing is obtained which has good is stirred until the coupling is complete. The disazo dyewet fastness properties and excellent fastness to light.

stufi obtained in this way is precipitated with sodium When subjecting the dyeings obtained in Example 26 chloride, filtered off and dissolved again in 2500 ml. of to Wash Test 3, prescribed in Standard Methods for 8085 hot water. 400 ml. of a copper oxide-ammonia the Determination of the Colour Fastness of Textiles solution which contains 50 g. of crystalline copper sulpublished by the Society of Dyers and Colourists, Bradphate and 120 ml. of concentrated aqueous ammonia are ford, Yorkshire, p. 106/107 (1962), they are free from then added to the above solution and the whole is stirred bleeding on wool, while the dyeings prepared in an identifor 4-5 hours at -85". After adding another 50 ml. cal manner with the above-mentioned known dyestulfs of concentrated ammonia solution, the whole is heated which are distinguished structurally only by a semi-urea for 15 hours at -95 The copper complex formed is bridge instead of the -NH-CO-NH-bridge of the dyeprecipitated with sodium chloride, filtered ofi and dried. stuffs according to the instant invention, show pronounced It is a dark powder which dissolves in water with a blue 75 bleeding.

weclaimz h l v e,

1.- Acop'per-complex disazo dyesluif which. incitsfrec wherein ;Y represents hydrogen, lower alkyl, chlorine acid form is of the'f ormnla w or bromine. s 1

INH 1 wherein Y represents hydrogen, lower alliyl, lower alkoxy, lower alkahoylamino, benzoylamino, nitro, 3. A copper-complex disazo dyestuff which in its free sulfo, chlorine or bromine. 'acid' form is of the formula 4. A'copper-complex disazo dyestuff which in its free acid form is of the formula 4 H038 OCu-0 O Cu 0 v y l I a I I =N -N=N -sour H038 NHCONHQ 2. A copper-complex disazo dyestuflf which in its free acid form is of the formula OTu----O O(llu o- 7 S0311 11038 NE Y: 5. A coppencomplex disazo dyestufi which in its free acid form is of the formula O(i3u(l) OTu 1103s soar H035 \/NHC oNH -so;rr 6.. A copper-complex disazo dyestufi which in its free acid form is of the formula 1103s O(IJuO OTu (I) S0311 H03S- NI-ICONHSO:H

References Cited UNITED STATES PATENTS 2,753,335 7/1956 Wehrli a 260-148 VFLOY D D. HIGEL, Primary Examiner. 

